HR: 11:50h
AN: A11H-07    [PDF]
TI: Impacts of Nucleating Aerosol on the Characteristics of Cumulus Convection and the Associated Anvils During CRYSTAL-FACE
AU: * van den Heever, S C
EM: sue@atmos.colostate.edu
AF: Atmospheric Science Department Colorado State University, LaPorte Avenue, Fort Collins, CO 80523 United States
AU: Cotton, W R
EM: cotton@atmos.colostate.edu
AF: Atmospheric Science Department Colorado State University, LaPorte Avenue, Fort Collins, CO 80523 United States
AB: Unusually high aerosol concentrations were observed on 28 July 2002, during the CRYSTAL-FACE field program conducted over the Florida peninsula. The impacts of nucleating aerosol on the characteristics of the cumulus convection and associated anvils that developed on this day have been investigated using the Regional Atmospheric Modeling System (RAMS). Simulations were conducted in which the concentrations of cloud condensation nuclei (CCN), giant CCN (GCCN) and ice forming nuclei (IFN) were varied from "clean" air concentrations to "dirty" air concentrations. The location and strength of the cumulus convection, the depth and longevity of the anvil, hydrometeor size distributions, and the amount and distribution of precipitation at the surface were all affected by these variations in nucleating aerosol concentrations.
DE: 3314 Convective processes
DE: 3329 Mesoscale meteorology
DE: 3337 Numerical modeling and data assimilation
DE: 3354 Precipitation (1854)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting